INDUSTRIES SERVED
Criminal Investigation
RJ Lee Group is recognized as a leading authority in criminal forensics, with particular expertise in gunshot residue (GSR) analysis. We work collaboratively with hundreds of agencies across the United States and internationally, providing scientifically sound and impartial forensic support.
We partner with law enforcement agencies, prosecutorial offices, public defenders, private defense attorneys, private investigators, and other forensic laboratories, supporting investigations and legal proceedings through objective analysis and clear communication of results. Our forensic scientists are highly experienced testifying experts, with extensive deposition and trial experience in state and federal courts across numerous U.S. jurisdictions and abroad, for both the prosecution and the defense.
Our litigation support services are grounded in a strong respect for the legal process, a thorough understanding of scientific and technical issues, and a commitment to presenting forensic data with accuracy, clarity, and credibility. Our role is to equip clients with reliable scientific information and expert insight to support informed decision making in complex cases.
Stronger Cases Start With Better Science
Whether you're preparing for trial, reviewing prior lab work, or training your team on evidence collection, our scientists support law enforcement and legal professionals at every stage of a GSR case:
Consulting Services
Expert review of laboratory analyses and forensic reports to identify potential issues or inaccuracies in prior testing or testimony, or to help strategize the usage of these results.
Expert Witness Services
Clear, credible testimony based on solid scientific evidence to support legal proceedings and case resolutions.
Training
Proper collection of GSR and interpreting results in the context of real-world investigations and legal proceedings.
Presentations
Client-curated presentations explaining gunshot residue collection, analysis, and interpretation.

Representative Clients
Law Enforcement Agencies
Public Defenders
Prosecutorial Offices
Private Defense
Crime Labs
Private Investigators
"In addition to doing outstanding work on the testing of important evidence, RJ Lee offers seasoned experts that will do a great job testifying. More importantly, they will take all the time needed to prepare an attorney for presenting the evidence in a way a lay person jury can understand."
Deputy Douglas County Attorney
Omaha, NE

Our Approach
RJ Lee Group’s approach to criminal forensics is grounded in scientific rigor, validated methodologies, and an understanding of legal relevance. Our forensic scientists apply careful analytical practices and professional judgment to ensure each examination is thorough, accurate, and defensible within investigative and courtroom settings.
Key Services
- Gunshot Residue (GSR) Analysis
- Forensic Consultation Services
- Training and Education Programs
What Sets Us Apart
RJ Lee Group is distinguished by our ability to deliver fast, reliable turnaround times without compromising scientific rigor, even in complex or high volume gunshot residue (GSR) casework. Our laboratory routinely supports time sensitive investigations and agencies managing significant backlogs.
Equally important is the depth of experience of our forensic scientists. Our experts are highly experienced testifying professionals, with extensive testimony experience in state and federal courts across numerous U.S. jurisdictions and internationally. They are trusted to explain complex forensic findings clearly, accurately, and objectively.
This combination of efficient analysis, technical precision, and courtroom experience allows RJ Lee Group to support investigations and legal proceedings with confidence, clarity, and professionalism.

Gunshot Residue Analysis
RJ Lee Group provides primer gunshot residue (GSR) analysis using SEM/EDS, a well established method for identifying microscopic primer residue particles. Our scientists analyze samples collected from hands, clothing, vehicles, and other surfaces relevant to firearm related investigations. With extensive casework and courtroom experience, our experts deliver accurate, clearly communicated results that are appropriate for investigative decision making and testimony in legal proceedings.
Strengthen Your Investigative Strategy



